Telephone.



C. G. BLACKHAM.

TELEPHONE;

APPLICATION FILED MAYL 1911,

1,022,350. Patented Apr. 2, 1912.

woe 11 for gim wm ,CHA'RTAES C. BLACKHAM, 0F BRIDGEPORT, CONNECTICUT.

TELEPHONE.

Specification of Letters Patent.

Patented Apr. 2, 1912.

Application filed May 4, 1911. Serial No. 625,000.

To all whom 'it may concern:

Be it known that I, CHARLES C. BLACK- HAM, a citizen of the United States, and resident of Bridgeport, in the county of F airfield and State of Connecticut, have invented certain new and useful Improvements in Telephones, of which the following is a specification.

This invention relates to new and useful improvements in magnetic telephones, and particularly to what are commonly called portable or desk phones.

It is the object of my invention to provide an instrument in which the receiver and transmitter are combined upon a single bracket and pivotally connected to the port able stand, so that when the receiver 18 in proper position at the ear the transmitter is also in position for use in front of the mouth; to so arrange/and construct the pivotal connection of the bracket and stand, that the electrical connections for receiver and transmitter will be automatically regulated with the adjustment of the bracket.

With these and other objects in view the invention consists in the novel combination, construction and arrangement. of parts hereinafter fully described, illustrated in the accompanying drawings. and pointed out in the claims hereto appended, it being understood that various changes in the proportion, form, size and minor 'details of construction within the scope of the claims may be resorted to without departure from the spirit or sacrificing any 0 fthe advantages of the invention.

Similar characters of reference will be found to denote like or corresponding parts throughout the several figures of the accom: panying drawings forming a part of this specification, and upon which- Figure 1, shows a side elevation of a portable telephone including my pivotal combined transmitter and receiver, and, Fig. 2, is a frontview of the telephone shown in Fig. 1.

Referring in detail tothecharacters. of reference marked upon the drawings 5 indicates the stand as a whole, to which the bracket is pivoted. This stand may be of the usual or any preferred construction, and includes a heavy base portion having a vertically disposed tubular post mounted thereon. The wires are obviously threaded in through the base and up into the tube where side, and then again in holes in the side of stand where they are properly connectedto the posts of circuit wire and circuit lever 12. This allows the bracket to be freely swung back and forth with respect to the post, to

.adjust the bracket for use. and automatically operate the switch mechanism to facilitate talking. The bracket (3 is normally supported in a vertical position as shown in full lines in the drawings, but is adapted to beaidjnstcd to either the right or left, see dotted lines Fig. 2. for the purpose of talking. thus making it doubly convenient to be used against either the right or left car as preferred. and still be in position for the month. i

A special form of eccentric cam 11 is secured to the back of the bracketadjacentto the pivotal point. to cngage-thc outwardly disposed end 13 of the contact lever 1:3 which.

lever is pivotally connected inside of the post and constructed and arranged to make and break the electrical connection of the telephone when the bracketis swung upon the pivot. The lower edge portion of this cam is farther from the pivotal point than the side edges and thus serves to engage and hold the said lever 12 down when the bracket is in an upright position, but permits of its swinging up to make the electrical connection when the said bracket is swung to one side for use. Suitable steps 14 are formed in the two outer edge portions of this cam to strike the sides of the end 13 of the before mentioned lever 12, to limit the amount of movemcnt of the bracket. The bracket is thus swung to an angular position for use. and shoved back in a vertical position to disconnect. the circuit when not in use, thereby making and breaking the connections in very much the same manner as is now done with the ordinary and common form of detachablc receiver when taken off and put back on the hook, the lever 12 in this case v 4 taking the place of, and performing the same function as the hook lever on such common t'orms of telephones.

Having thus described my invention what I claim and desire to secure by Letters Pat'- cnt is,

1. In a telephone of the class described, the combination with a hollow supporting stand, a Contact lever extended out therefrom and adapted to make and break the electrical circuit, a combined receiver and transmitter bracket pivotally connected to the stand, means carried by the bracket to engage the lever before mentioned for oper-.

ating the same to make and break the said electrical connections by the turning of the bracket with relation to the stand.

2. In a telephone bracket of the class described, the combination with a supporting stand, ot a curved bracket pivot ally eonnect ed thereto, a transmitter mounted in one end of: the bracket and a receiver upon the other,

a pivotal lever carried by the stand and adapted to make and break the electrical con nect ions for the receiver and transmitter, a cam carrie l by the bracket and adapted to engage said lever in a way to hold the same out of contact when the bracket is in a vertical position, and constructed to allow the lever to form a connection when the b acket is adjusted for use.

8'. In a telephone of the class described, the combination with a hollow supporting stand, a pivotal contact lever extended out therefrom and adapted to-i'nake and break l l l the electrical circuit for the telephone, a curved bracket pivotally connected to the stand, a transmitter connected to the upper end of said-bracket and a receiver upon the lower end thereof, a cam carried by the bracket to engagethe lever before mentioned tor operating the same to make and break the said electrical connections by the turning of the bracket with relation to the stand, and means for limiting the said movement. 1 t. In a telephone bracket of the class described, the combination with a supporting stand. of a curved bracket pivotally connected thereto, a transmitter mounted. in one end 01" the bracket and a receiver upon the other; a pivotal lever mounted in the stand below the pivotal point of the bracket and adapted to make and break the electrical connections for the receiver and transmitter, a cam carried by the bracket above the lever and adapted to engage the same ina Way to hold the lever down and out of contact when the bracket is in a vertical position and constructed to allow the 'lever to rise up to term a connection when the bracket is adjusted for'use.

Signed at Bridgeport, in the county of Fairfield and State of Connecticut, this 3rd day of May A. D., 1.911.

CHARLES C.

BLAOKHAM 

